The 923 Air Velocity Meter (the Product) is a handheld, indoor-air quality diagnostic instrument. It uses a probe that can be used while attached to the Product or in wireless mode away from the Product base.
 
The Product measures, calculates, and displays:
• Air temperature measured in Celsius (°C) or Fahrenheit (°F).
• Air velocity (actual) measured in m/s or fpm.
• Flow rate displayed in l/s, cfm or m3 /hr.
• Average indications for temperature, velocity, and flow.